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(No Model.) 2 Sheets-Sheet 1. J. T. HAMBAY.-

FLUID REGULATOR AND GUT-OPP. No. 311,747. Patented Feb. 3, 1885.

No Model.) J,v TI HAMBAY, l 2 sheets-sheen 2.

, UNirnn STATES .ATENT Ninon.

JAMES'r. HAMBAY, on rrr'rs'une, PENNSYLVANIA, ASsiGNoE 'ro GEORGEwrsfriNonoUSE, Jn., on SAME PLACE.

FLUID REGULATOR AND CUT-OFF.

SPECIFICATION ''ozning part of Letters IPatent No. 311,747, datedFebruary 3, 1885. Application tiled October l, 1894. (No moiel To au.whom t 17mg conce/"n:

Be it known that I, JAMES T. HAMEAY, a citizen ofthe United States,residing at Pit-ts# burg, in the county of Allegheny and State ofPennsylvania, have invented or discovered certain new and usefulImprovements in Fluid Regulators'and Gut-'Otis of which improvements thefollowing is a specification.'

In the accompanying drawings, which make to part of this specification,Figure lis an elevation, partly in section, of my improved gas regulatorand cut-oft'. Fig. 2 is a similar view l showing a modified i'orm ot'valve. Fig. 3 is asectional detail view ot' the "alvefsh vn in Fig. 2.Fig. 4shows the slotted weight in elevation. My invention relates to animproved valv and operating mechanism for the automatic regulation ot'the pressure ot gas at the points 2o of consumption as against anexcessivev pressure, and also for automatically cutting ot't' the g ygassupply when the pressure is reduced to a dangerous extent.

The object of my invention is to provide means whereby natural gas,which is charged intok the mains at such a high pressure that it isnearly impossible to prevent leakage fromI the mains, may be supplied tohouses, or other inclosed places where Such leakage could colio lect indangerous quantities, at'such a low pressure that there isslightprobability ofthe occurrence of any leakage; and my invention hasalso for. its object the prevention ot' the escape of gas from openburners at which the l iiame has been extinguished by a reduction of canflow from the inlet-chamber 2 to the out. 5( let-chamber 3., and throughthese openings 7 and 8 passes the valve-rod 9, on which are secured thedouble-balanced valves 10 and l1, adapted to litsuitably-formed seats atthe ends ot' said openings, as shown. The upper end 5r ot the lvalvestem or rod extends through the stutiing-box 12 on the upper side ofthevalvecase, and the lower end of the rod fits into a suitableguideopening, 13, in the lower side of the case.

'lo the4 upper end of the valve-rod, outside ot the case, is attachedthe end of the short arm of the lever 14, pivoted to the standard l5,secured to the top of the case, as shown; and to the long arm of thelever, near its outer end, is adjustably attached the pistoni-od 16,extending into the cylinder 17, and

provided with a piston, 18, adapted to operate in said cylinder, whichis connected to the inlet-pipe 6 by the T-coupling 19. 70

On the long arm of the lever 14 is placed the weight 20, provided with avertical slot to allow thelever to move independent ofthe weight, whichin certain positions of thelever rests upon a bracket, 2l, secured tothe top of 7 5 l.the cylinder 17.

To the outer end of the long arm of the lever 14 is attached one end ofa spring, 22, the

.opposite end of the spring being secured to a lug, 23, projecting fromthe bottom of the cylinder 17. This spring aids in the downward movementof the lever and piston after the former has been relieved of the weight20, and the tension to which it is adjusted determines the minimumpressure necessary to move the piston and open the valves. The head ofthe cylinder 17 is perforated, as shown, to allow tof the escape of theair above the piston during the upward movement ot the piston.

The valve mechanism having been att-ached 9o to the service-pipe, asabove described, and the minimum and-maximum pressures to be employed atthe point or points of use having been determined, the spring 22 is soadjusted that its tension will be sufticient to hold the 95 lever andpiston at the lowest point of their movement until the minimum pressureis exceeded. The valve-Stem 9 and piston-rod 16 are so connected to thelever 14 that when the piston-18 is at the lower or upper end of thecylinder thevalves 1l or 10 will be held onto their seats, but when thepiston is at or near the middle of its stroke the valves will be openedto the fullest extent; hence any move! ment of piston to either side ofits central position lwill effect a partial or entire closing of Theweight 20 is made of such al minimum, the Weight is supported bythebracket 2 l, which is arranged at such a height as to support theweight when the piston is at or below the middle of t-he cylinder, andis vertically slotted so as to permit the piston to freely moveindependent thereof between its middle and lowest positions.

It will be observed that as the valves are perfectly balanced the pistonin its movements will not have to overcome the pressure of gas on thevalves, and as the piston is attached to the long arm of the lever,slight pressures on the piston will easily move the valves. By makingthe valves balanced by having the pressure act on the long arm of thelever, the device can be delicately ffdjusted and will quickly respondyto slight variations in pressure.

It will be seen from the 'above that variav tions of pressure above themaximum or beduced, but should they be closed bya reduction of pressurebelow the minimum-. e, the point at which the f l une at some or allofthe barriers isextinguished-the valves will remain closed until thelever and piston are raised by some attendant, thus preventing anyescape from the burners on the restoration of pressure.

ln place of the valve mechanism shown, I may employ a plug-valve, 24, asshown in Fig. 2, the lever 14 being so connect-ed to a crankarm of thestem of the plug-valve by the rod 25 that said valve will be open whenthevpiston is at or near the middle point of its stroke.

The operation of t-he other parts of the device with a plug-valvemechanism is similaito that-above described.

When it is desired to use the valve and operating mechanism shown inFig. 1 as a regulator only to prevent excessive pressures, the lowervalves, 11, and the stop 21 should be omitted, in which case the supplyis cut ofi' only when the pressure is above the maximum.

In lieu of either the double-balanced or the plug-valve described, anyother suit-able double-acting valve may be used, and by double-actingvalve7 I mean one that is capable of being opened and closed by themovement of the valve in either direction.

I claim herein as my invention- 1. In a system of two or more pipes forthe supply and distribution, under different pressures, of fluids underpressure, a double-acting valve for regulating and cutting oli' thesupply from the high-pressure part of the system to the low-pressurepart, in combination with a piston connected to said valve and subjectto pressure from the low-pressure part of the system, said parts beingso arranged for conjoint operation that the valve is closed by anabnormal pressure and opened by a redue` tion to normal pressure, and isclosed by a dangerous reduction of pressure, and held in such closedposition when the pressure is restored, substantially as set forth.

2. In a gas regulatorand cut-off, thecombination of double-balancedvalves and a piston for operating said valves, said parts being arrangedin such relation to each other that the valves are closed by an abnormalincrease of pressure and opened by a reduction to normal pressure, andare closed by a dangerous reduction of pressure, and held in such closedposition when the pressure is restored, substantially as set forth.

3. In a gas-regulator, the combination of balanced valves, a leverconnected at one end to said valves, a cylinder having its pistonconnected to the opposite end of said lever, and a weight mounted on thelever, substantially as set forth.

4. In agas regulator and cut-off, the combination of a double-actingvalve, a lever con! JAMES T. HAMBAY.

Witnesses:

DARWIN S. WoLcoTT,

lt. H. WHI'rfrLigsEY.

